Baked in a 375 degree Fahrenheit oven, 1 ½-pound Cornish game hens are ready in an hour to one hour and 15 minutes. They should be cooked until the internal temperature of the thigh reaches 180 degrees on an instant-read thermometer.
Cornish game hens are often prepared by sprinkling them with a variety of spices, such as a lemon-pepper seasoning with dried onion, thyme and coriander seeds. Blackened game hens are sprinkled with several savory spices, including dark chili powder, garlic powder, onion powder, red pepper flakes and paprika. Rosemary, thyme, lemon zest, salt and pepper combine to form a milder blend of seasonings for Cornish hens.